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Mello

  • 3 years ago

Geometry~!

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  1. Mello
    • 3 years ago
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    |dw:1355117160816:dw|

  2. phi
    • 3 years ago
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    is ABCD a parallelogram or a rhombus?

  3. Mello
    • 3 years ago
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    Rhombus, :D

  4. tamtoan
    • 3 years ago
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    the figure is not drawn to scale, so it's harder to see let me draw again and you can check to see if i am right. |dw:1355076484153:dw|

  5. tamtoan
    • 3 years ago
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    BD is perpendicular to AC since they are diagonals of a rhombus look at triangle ABD, the area is ABxDH = BDx(AC/2) since AC/2 = DH ==> AB = BD and since AB = AD also, (rhombus), triangle ABD have 3 sides equal, (they are called equalateral triangle right?), each angle is 60 degree so angle ABC = 2x60 = 120

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